Astrophotography: Featuring the Fx System of Exposure Determination By Gordon, Barry Books / Paperback Books › Science › Astronomy ISBN: 0943396077 / Publisher: Willmann-Bell, August 1985 Price Starting at $48.71 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Used - Like New High Quality! Like New condition. A near perfect copy that may have very minor cosmetic defects. $5.59 1 in Stock at Warehouse Quantity Add Used - Good Good condition. Revised and Enlarged 2nd edition. (astronomy, photography, telescopes) $48.71 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for Astrophotography: Featuring the Fx System of Exposure Determination